need help with downloading software

i am trying to download a free trial of a video game design program called (video game design pro 2006)
i tried download.com and it said it no longer exists
i tried the homepage of the program ( http://www.thecorpament.com/ )
but i got an error message saying "Error creating file! Directory may not be writable or may not exist.
Unable to process request."
when i tried to download it.
someone plz help